Just do not confuse the series of cree xm l and xm l2 they differ in.
1400 lumen cree xm l u3 bulb.
Brightness has modestly.
Delivering breakthrough lumen output and efficacy in the xm package the xlamp xm l2 led is the highest performing commercially available single die led.
10 watts 1000 lumens.
The t6 bin is present in both the xm l xm l2 emitters.
Built on the sc technology platform the xlamp xm l2 led delivers up to 20 more lumens and lumens per watt and double the lumens per dollar of the original xm l.
Some of the lights they build really make mine look workmanlike in comparison.
Similar in size 5mm x 5mm to the xm l the l2 has increased brightness by about 20.
I compared its beam with the beam from a fenix pd31 which puts out just over 300 lumens and the fenix light was easily observed to swallow up the bestsun led so its nowhere near 1200.
T6 output within the l2 peaks between 1044 1119 lumens.
I encourage you head over to those forums and loo.
The u3 bin has now appeared in many flashlights.
Led series cree xm l as many refer to their xml became the most powerful super bright led diodes.
Xlamp xm l leds offer the unique combination of very high efficacy at very high drive currents delivering 1000 lumens with 100 lumens per watt efficacy at 3 a in a compact 5 mm x 5 mm footprint.
With its compact dimensions of 5 by 5 mm.
This is patently absurd its real output is somewhere in the 200 300 lumen range and that at best.
Basic parameters cree xm l2 u2 and u3.
It has also omitted the grid found on the xm l.
With its breakthrough light output and efficacy the xm l led is designed for very high lumen applications such as high bay indoor commercial or roadway lighting.
For those who are not particularly versed technical documentation to draw up a table of main parameters.
But if there were no signs of cree the more likely that you would have bought something else that will justify their confidence.